Abstract:Objective:To study the expression of MMP2, MMP9, vascular endothelial growth factor (VEGF) and RECK genes in bladder cancer tissues, so as to provide evidence for studying the molecular mechanism of bladder cancer metastasis. Methods: Reverse transcription polymerase chain reaction (RTPCR) was used to determine the expression of MMP2, MMP9, VEGF and RECK genes in 50 operative specimens of bladder cancer and their corresponding adjacent normal tissues; and the clinical significance of the expression was analyzed. Results: The positive rates of MMP2, MMP9, VEGF and RECK mRNA in the bladder cancer specimens were 80%, 56%, 78% and 64%, respectively. The expression levels of MMP2, MMP9 and VEGF mRNA in bladder cancer specimens were significantly higher than those in the paired adjacent normal bladder tissues(P<0.05); the expression level of RECK genes in bladder cancer specimens was significantly lower than that in the normal tissue(P<0.05). The expression levels of MMP2, MMP9 and VEGF was closely correlated with the clinical stages and grades of bladder cancer; there was no relation between the level of RECK expression and clinical stages and grades of the cancer. Conclusion: Abnormal expression of multigenes is present in bladder cancer tissues; the development, progression and metastasis of bladder cancer are associated with abnormal expression of multigenes.